Improvement in pumps



P. M. 'su Vo.- SNBLL.

y EUMP.

No. 104.786. Patented June 28, 1870.

423.61% "'.r` "2 cwxggn f To all whom. 'it may concern:

PETER M. SNLL AND OSCAR SNELL, Oli WILLIAMSBURG, OHIO.

Letters Patent No. 104,786, dated .Tu/ne 28. 1870.

IMPROVEMENT IN PUMPS.

The Schedule referred to in these Letters Patent and making part o! the same.

YBe itknown that we, PETER M. SNELL and OSCAR SNELL, of Williamsburg, in the county of -Clermont andtate of Ohio, have invented a. new and useful Improvement in EireandDeck-Pnmps; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing making a part of this speciication,l in which- Figure 1 is a sectional elevation, and

Figure 2 is a sectional plan. A

This invention consists in the application of a lever having a movable fulcrum placed in verticalV slots, said fulcrum being directly connected with a slide-valve to the operation of the piston of' a force-pump, for the purpose ofgiving the slide-valve the movement requisite to opening and closing the cylinder ports.

In the drawingi A is the cylinder;

a a, the ports; I 4 b, the chamber between the ports into which the inlet-pipe c opens, and which chamber opens by'a passngel, d, into the central chamber of the slide-valve e; an(

his the delivery-pipe, opening out of the valve-race ber, and sustain the lever between them, 4

Gis a pitman connecting the pistonrod with the lever.

Suppose the piston to be ai; the bottom of the cylthe valve e be atI its lowest position, leaving the npper port a open, andI putting the central valve-chamber into communication both'with the passage d and 'lower porta, so that water from the cylinder flows ont of the upper port through the valve-race, and out by the delivery-pipe, and Vwater from the inlet-pipe flows from the chamber b, through the lower port, into the cylinder.

On lowering thc piston, owing to the resistance of the water in the cylinder, the trunnions are raised to the tops of the slots n, and lift the slide-valve, so that it opens the lower port and establishes communication between the chamber b and the upper port. Hence the placing of the trunuions in slots gives the requisite movement to the slide-valve.

Having' thus described our invention,

Vhat we claim as new, and ldesire to secure by Letters Patent, is

A force-pnmplever, having a movable fulcrumcon nected with the valve that controls the cylinder-ports in the manner described, and for the purpose .oi' giving the requisite motion to the same.

PETER M. SNELL. OSCAR SNELL.

Witnesses: l SARAH FRAZIER, J. S. B. FRAzrER. 

